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Finding the Fourth Proportional to 627.57, 865.49 and 529.16

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Solution

The fourth proportional to 627.57, 865.49 and 529.16 is: 729.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.57 : 865.49 = 529.16 : x
  2. Step 2: Convert to fraction form
    627.57/865.49 = 529.16/x
  3. Step 3: Cross multiply
    627.57x = 865.49 × 529.16
  4. Step 4: Simplify right side
    627.57x = 457,975.72
  5. Step 5: Solve for x
    x = 457,975.72/627.57
  6. Step 6: Final answer
    x = 729.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.